An arrest report said Eddie Robb was found unresponsive in his bedroom. He died from a fractured skull and severe brain injury.

The newspaper reports that police interviews with Rivet and girlfriend Brandi Robb indicated the boy had woken up Rivet’s 3-year-old daughter, who was in the same room. Robb told investigators she heard a “thud” after Rivet went upstairs to check on Eddie. A couple of hours later the child was found unresponsive.

It wasn’t clear what caused the delay between Eddie’s death and Rivet’s arrest. No attorney was listed on jail records.